RFR: 8280642: IllegalAccessError thrown by ObjectInputStream.resolveProxyClass is not handled

[Mandy Chung]

On Fri, 28 Jan 2022 21:02:23 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> During deserialization of a serialized data stream that contains a proxy descriptor with non-public interfaces
> `java.io.ObjectInputStream` checks that the interfaces can be loaded from a single classloader in `ObjectInputStream.resolveProxyClass`.
> If the interfaces cannot be loaded from a single classloader, an `IllegalAccessError` is thrown.
> When `ObjectInputStream.readObject` encounters this case, it reflects an incompatibility
> between the classloaders of the source of the serialized stream and the classloader being used for deserialization.
> When a proxy object cannot be created from the interfaces, `ObjectInputStream.readObject` should catch
> the `InvalidAccessError` and throw `InvalidObjectException` with the `InvalidAccessError` as the cause.
> This allows the application to handle the exception consistently with other errors during deserialization.

`readProxyDesc` throws a mix of `InvalidClassException` and `InvalidObjectException`.   I'm not close to the spec of this area and let others to comment which one would be appropriate for this case.    In general, wrapping IAE with an existing exception is a reasonable solution.

IMO,  it'd be helpful to clarify this in the javadoc and document this specific exception.

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PR: https://git.openjdk.java.net/jdk/pull/7274